1 Division of Thoracic Surgery, Department of Surgery, Mayo Clinic, 200 1st St SW, Rochester, MN 55905.
2 Kern Center for the Science of Health Care Delivery, Mayo Clinic, Rochester, Minnesota.
3 Division of Thoracic Surgery, Department of Surgery, Mayo Clinic, 200 1st St SW, Rochester, MN 55905. Electronic address: shandablackmon@hotmail.com.